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Class 10
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Ohm's Law
Ohm's Law
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1)
Which Law explains the following. At constant temperature the current flowing through a conductor is directly proportional to the potential difference between its ends.
Ohm’s Law
Charle’s Law
Boyle’s Law
Joule’s Law
2)
The current through a wire depends on?
The thickness of the wire.
The potential difference applied.
Both resistance and potential difference.
The resistance of the wire.
3)
Which of the following is an example for Ohmic resistor?
Diamond
Diode
Germanium
Nichrome
4)
What is reciprocal of resistivity called?
Capacitance
Conductance
Specific resistance
Conductivity
5)
Which of the following statement does not represent Ohm's Law?
potential difference/resistance = current
potential difference / current = resistance
current = resistance x potential difference
potential difference = current x resistance
6)
The work done in moving a unit positive charge across two points in an electric circuit is a measure of ___________.
power
potential difference
resistance
current
7)
The potential at a point is 20 V. The work done to bring a charge of 0.5 C from infinity to this point will be ________.
5 J
10 J
20 J
40 J
8)
The device used for measuring potential difference is known as _____________.
voltmeter
ammeter
galvanometer
potentiometer
9)
The unit of resistivity is ____________. Answer: 3
mho
ohm-m
ohm
ohm / m
10)
The unit of current is _____________.
ampere
volt
coulomb
watt
11)
Two electric bulbs of 100 W, 200 V are put in series and the combination is supplied 100 V. The power consumption of each bulb will be
100 / 4 W
100 / 16 W
100 / 8 W
100 / 2 W
12)
Ohm's law is not applicable to
semi-conductors
high currents
DC circuits
small resistors
13)
Resistance of a wire is r ohms. The wire is stretched to double its length, then its resistance in ohms is
(D) r / 4.
(C) 2 r
(B) 4 r
(A) r / 2
14)
Resistivity of a wire depends on
none of the above.
cross section area
length
material
15)
Ohm's law is a relationship between
voltage, current, and time
voltage, current, and resistance
power, current, and resistance
resistance, time, and current
16)
If current through a resistance is halved
the voltage is halved
none of the above
the resistance is halved
the voltage doubles
17)
Ohm's law describes the mathematical relationship between
none of the above
resistance, voltage, and current
resistor size and resistor value
ohms, kilohms, and megohms
18)
If voltage across a resistance doubles
the current is halved
the resistance doubles
none of the above
the current is unchanged
19)
If the resistance in a circuit with constant voltage increases, the current will
decrease
Not enough information
increase
stay the same
20)
If doubling the voltage across a resistor doubles the current through the resistor then
the resistor value increased
it is impossible to determine the change in t
the resistor value decreased
the resistor value did not change
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Cite this Simulator:
amrita.olabs.edu.in,. (2014). Ohm's Law. Retrieved 25 April 2017, from amrita.olabs.edu.in/?sub=1&brch=4&sim=99&cnt=388